2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
13 % Read/Write HP PCL Printer Format %
20 % Copyright 1999-2017 ImageMagick Studio LLC, a non-profit organization %
21 % dedicated to making software imaging solutions freely available. %
23 % You may not use this file except in compliance with the License. You may %
24 % obtain a copy of the License at %
26 % http://www.imagemagick.org/script/license.php %
28 % Unless required by applicable law or agreed to in writing, software %
29 % distributed under the License is distributed on an "AS IS" BASIS, %
30 % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
31 % See the License for the specific language governing permissions and %
32 % limitations under the License. %
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
42 #include "MagickCore/studio.h"
43 #include "MagickCore/artifact.h"
44 #include "MagickCore/attribute.h"
45 #include "MagickCore/blob.h"
46 #include "MagickCore/blob-private.h"
47 #include "MagickCore/cache.h"
48 #include "MagickCore/color.h"
49 #include "MagickCore/color-private.h"
50 #include "MagickCore/colorspace.h"
51 #include "MagickCore/colorspace-private.h"
52 #include "MagickCore/constitute.h"
53 #include "MagickCore/delegate.h"
54 #include "MagickCore/draw.h"
55 #include "MagickCore/exception.h"
56 #include "MagickCore/exception-private.h"
57 #include "MagickCore/geometry.h"
58 #include "MagickCore/image.h"
59 #include "MagickCore/image-private.h"
60 #include "MagickCore/list.h"
61 #include "MagickCore/magick.h"
62 #include "MagickCore/memory_.h"
63 #include "MagickCore/monitor.h"
64 #include "MagickCore/monitor-private.h"
65 #include "MagickCore/option.h"
66 #include "MagickCore/pixel-accessor.h"
67 #include "MagickCore/profile.h"
68 #include "MagickCore/property.h"
69 #include "MagickCore/resource_.h"
70 #include "MagickCore/quantum-private.h"
71 #include "MagickCore/static.h"
72 #include "MagickCore/string_.h"
73 #include "MagickCore/module.h"
74 #include "MagickCore/token.h"
75 #include "MagickCore/transform.h"
76 #include "MagickCore/utility.h"
81 static MagickBooleanType
82 WritePCLImage(const ImageInfo *,Image *,ExceptionInfo *);
85 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
93 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
95 % IsPCL() returns MagickTrue if the image format type, identified by the
96 % magick string, is PCL.
98 % The format of the IsPCL method is:
100 % MagickBooleanType IsPCL(const unsigned char *magick,const size_t length)
102 % A description of each parameter follows:
104 % o magick: compare image format pattern against these bytes.
106 % o length: Specifies the length of the magick string.
109 static MagickBooleanType IsPCL(const unsigned char *magick,const size_t length)
113 if (memcmp(magick,"\033E\033&",4) == 0)
115 if (memcmp(magick,"\033E\033",3) == 0)
121 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
125 % R e a d P C L I m a g e %
129 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
131 % ReadPCLImage() reads a Printer Control Language image file and returns it.
132 % It allocates the memory necessary for the new Image structure and returns a
133 % pointer to the new image.
135 % The format of the ReadPCLImage method is:
137 % Image *ReadPCLImage(const ImageInfo *image_info,ExceptionInfo *exception)
139 % A description of each parameter follows:
141 % o image_info: the image info.
143 % o exception: return any errors or warnings in this structure.
146 static Image *ReadPCLImage(const ImageInfo *image_info,ExceptionInfo *exception)
148 #define CropBox "CropBox"
149 #define DeviceCMYK "DeviceCMYK"
150 #define MediaBox "MediaBox"
151 #define RenderPCLText " Rendering PCL... "
154 command[MagickPathExtent],
156 filename[MagickPathExtent],
157 geometry[MagickPathExtent],
159 input_filename[MagickPathExtent];
198 assert(image_info != (const ImageInfo *) NULL);
199 assert(image_info->signature == MagickCoreSignature);
200 if (image_info->debug != MagickFalse)
201 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
202 image_info->filename);
203 assert(exception != (ExceptionInfo *) NULL);
204 assert(exception->signature == MagickCoreSignature);
208 image=AcquireImage(image_info,exception);
209 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
210 if (status == MagickFalse)
212 image=DestroyImageList(image);
213 return((Image *) NULL);
215 status=AcquireUniqueSymbolicLink(image_info->filename,input_filename);
216 if (status == MagickFalse)
218 ThrowFileException(exception,FileOpenError,"UnableToCreateTemporaryFile",
219 image_info->filename);
220 image=DestroyImageList(image);
221 return((Image *) NULL);
224 Set the page density.
226 delta.x=DefaultResolution;
227 delta.y=DefaultResolution;
228 if ((image->resolution.x == 0.0) || (image->resolution.y == 0.0))
236 flags=ParseGeometry(PSDensityGeometry,&geometry_info);
237 image->resolution.x=geometry_info.rho;
238 image->resolution.y=geometry_info.sigma;
239 if ((flags & SigmaValue) == 0)
240 image->resolution.y=image->resolution.x;
243 Determine page geometry from the PCL media box.
245 cmyk=image->colorspace == CMYKColorspace ? MagickTrue : MagickFalse;
247 (void) ResetMagickMemory(&bounding_box,0,sizeof(bounding_box));
248 (void) ResetMagickMemory(&bounds,0,sizeof(bounds));
249 (void) ResetMagickMemory(&page,0,sizeof(page));
250 (void) ResetMagickMemory(command,0,sizeof(command));
252 for (c=ReadBlobByte(image); c != EOF; c=ReadBlobByte(image))
254 if (image_info->page != (char *) NULL)
260 if ((c != (int) '/') && (c != '\n') &&
261 ((size_t) (p-command) < (MagickPathExtent-1)))
266 Is this a CMYK document?
268 if (LocaleNCompare(DeviceCMYK,command,strlen(DeviceCMYK)) == 0)
270 if (LocaleNCompare(CropBox,command,strlen(CropBox)) == 0)
273 Note region defined by crop box.
275 count=(ssize_t) sscanf(command,"CropBox [%lf %lf %lf %lf",
276 &bounds.x1,&bounds.y1,&bounds.x2,&bounds.y2);
278 count=(ssize_t) sscanf(command,"CropBox[%lf %lf %lf %lf",
279 &bounds.x1,&bounds.y1,&bounds.x2,&bounds.y2);
281 if (LocaleNCompare(MediaBox,command,strlen(MediaBox)) == 0)
284 Note region defined by media box.
286 count=(ssize_t) sscanf(command,"MediaBox [%lf %lf %lf %lf",
287 &bounds.x1,&bounds.y1,&bounds.x2,&bounds.y2);
289 count=(ssize_t) sscanf(command,"MediaBox[%lf %lf %lf %lf",
290 &bounds.x1,&bounds.y1,&bounds.x2,&bounds.y2);
295 Set PCL render geometry.
297 width=(size_t) floor(bounds.x2-bounds.x1+0.5);
298 height=(size_t) floor(bounds.y2-bounds.y1+0.5);
299 if (width > page.width)
301 if (height > page.height)
304 (void) CloseBlob(image);
306 Render PCL with the GhostPCL delegate.
308 if ((page.width == 0) || (page.height == 0))
309 (void) ParseAbsoluteGeometry(PSPageGeometry,&page);
310 if (image_info->page != (char *) NULL)
311 (void) ParseAbsoluteGeometry(image_info->page,&page);
312 (void) FormatLocaleString(geometry,MagickPathExtent,"%.20gx%.20g",(double)
313 page.width,(double) page.height);
314 if (image_info->monochrome != MagickFalse)
315 delegate_info=GetDelegateInfo("pcl:mono",(char *) NULL,exception);
317 if (cmyk != MagickFalse)
318 delegate_info=GetDelegateInfo("pcl:cmyk",(char *) NULL,exception);
320 delegate_info=GetDelegateInfo("pcl:color",(char *) NULL,exception);
321 if (delegate_info == (const DelegateInfo *) NULL)
322 return((Image *) NULL);
323 if ((page.width == 0) || (page.height == 0))
324 (void) ParseAbsoluteGeometry(PSPageGeometry,&page);
325 if (image_info->page != (char *) NULL)
326 (void) ParseAbsoluteGeometry(image_info->page,&page);
327 density=AcquireString("");
328 options=AcquireString("");
329 (void) FormatLocaleString(density,MagickPathExtent,"%gx%g",image->resolution.x,
330 image->resolution.y);
331 page.width=(size_t) floor(page.width*image->resolution.x/delta.x+0.5);
332 page.height=(size_t) floor(page.height*image->resolution.y/delta.y+0.5);
333 (void) FormatLocaleString(options,MagickPathExtent,"-g%.20gx%.20g ",(double)
334 page.width,(double) page.height);
335 image=DestroyImage(image);
336 read_info=CloneImageInfo(image_info);
337 *read_info->magick='\0';
338 if (read_info->number_scenes != 0)
340 if (read_info->number_scenes != 1)
341 (void) FormatLocaleString(options,MagickPathExtent,"-dLastPage=%.20g",
342 (double) (read_info->scene+read_info->number_scenes));
344 (void) FormatLocaleString(options,MagickPathExtent,
345 "-dFirstPage=%.20g -dLastPage=%.20g",(double) read_info->scene+1,
346 (double) (read_info->scene+read_info->number_scenes));
347 read_info->number_scenes=0;
348 if (read_info->scenes != (char *) NULL)
349 *read_info->scenes='\0';
351 (void) CopyMagickString(filename,read_info->filename,MagickPathExtent);
352 (void) AcquireUniqueFilename(read_info->filename);
353 (void) FormatLocaleString(command,MagickPathExtent,
354 GetDelegateCommands(delegate_info),
355 read_info->antialias != MagickFalse ? 4 : 1,
356 read_info->antialias != MagickFalse ? 4 : 1,density,options,
357 read_info->filename,input_filename);
358 options=DestroyString(options);
359 density=DestroyString(density);
360 status=ExternalDelegateCommand(MagickFalse,read_info->verbose,command,
361 (char *) NULL,exception) != 0 ? MagickTrue : MagickFalse;
362 image=ReadImage(read_info,exception);
363 (void) RelinquishUniqueFileResource(read_info->filename);
364 (void) RelinquishUniqueFileResource(input_filename);
365 read_info=DestroyImageInfo(read_info);
366 if (image == (Image *) NULL)
367 ThrowReaderException(DelegateError,"PCLDelegateFailed");
368 if (LocaleCompare(image->magick,"BMP") == 0)
373 cmyk_image=ConsolidateCMYKImages(image,exception);
374 if (cmyk_image != (Image *) NULL)
376 image=DestroyImageList(image);
382 (void) CopyMagickString(image->filename,filename,MagickPathExtent);
384 next_image=SyncNextImageInList(image);
385 if (next_image != (Image *) NULL)
387 } while (next_image != (Image *) NULL);
388 return(GetFirstImageInList(image));
392 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
396 % R e g i s t e r P C L I m a g e %
400 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
402 % RegisterPCLImage() adds attributes for the PCL image format to
403 % the list of supported formats. The attributes include the image format
404 % tag, a method to read and/or write the format, whether the format
405 % supports the saving of more than one frame to the i file or blob,
406 % whether the format supports native in-memory I/O, and a brief
407 % description of the format.
409 % The format of the RegisterPCLImage method is:
411 % size_t RegisterPCLImage(void)
414 ModuleExport size_t RegisterPCLImage(void)
419 entry=AcquireMagickInfo("PCL","PCL","Printer Control Language");
420 entry->decoder=(DecodeImageHandler *) ReadPCLImage;
421 entry->encoder=(EncodeImageHandler *) WritePCLImage;
422 entry->magick=(IsImageFormatHandler *) IsPCL;
423 entry->flags^=CoderBlobSupportFlag;
424 entry->flags^=CoderDecoderThreadSupportFlag;
425 (void) RegisterMagickInfo(entry);
426 return(MagickImageCoderSignature);
430 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
434 % U n r e g i s t e r P C L I m a g e %
438 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
440 % UnregisterPCLImage() removes format registrations made by the PCL module
441 % from the list of supported formats.
443 % The format of the UnregisterPCLImage method is:
445 % UnregisterPCLImage(void)
448 ModuleExport void UnregisterPCLImage(void)
450 (void) UnregisterMagickInfo("PCL");
454 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
458 % W r i t e P C L I m a g e %
462 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
464 % WritePCLImage() writes an image in the Page Control Language encoded
467 % The format of the WritePCLImage method is:
469 % MagickBooleanType WritePCLImage(const ImageInfo *image_info,
470 % Image *image,ExceptionInfo *exception)
472 % A description of each parameter follows.
474 % o image_info: the image info.
476 % o image: The image.
478 % o exception: return any errors or warnings in this structure.
482 static size_t PCLDeltaCompressImage(const size_t length,
483 const unsigned char *previous_pixels,const unsigned char *pixels,
484 unsigned char *compress_pixels)
495 register unsigned char
499 for (x=0; x < (ssize_t) length; )
502 for (i=0; x < (ssize_t) length; x++)
504 if (*pixels++ != *previous_pixels++)
511 while (x < (ssize_t) length)
514 if (*pixels == *previous_pixels)
522 replacement=j >= 31 ? 31 : j;
524 delta=i >= 8 ? 8 : i;
525 *q++=(unsigned char) (((delta-1) << 5) | replacement);
526 if (replacement == 31)
528 for (replacement=255; j != 0; )
532 *q++=(unsigned char) replacement;
535 if (replacement == 255)
538 for (pixels-=i; i != 0; )
540 for (i-=delta; delta != 0; delta--)
547 *q++=(unsigned char) ((delta-1) << 5);
550 return((size_t) (q-compress_pixels));
553 static size_t PCLPackbitsCompressImage(const size_t length,
554 const unsigned char *pixels,unsigned char *compress_pixels)
562 register unsigned char
572 Compress pixels with Packbits encoding.
575 for (x=(ssize_t) length; x != 0; )
597 if ((*pixels == *(pixels+1)) && (*(pixels+1) == *(pixels+2)))
599 *q++=(unsigned char) ((256-3)+1);
611 if ((*pixels == *(pixels+1)) && (*(pixels+1) == *(pixels+2)))
617 while (((ssize_t) count < x) && (*pixels == *(pixels+count)))
624 *q++=(unsigned char) ((256-count)+1);
633 while ((*(pixels+count) != *(pixels+count+1)) ||
634 (*(pixels+count+1) != *(pixels+count+2)))
636 packbits[count+1]=pixels[count];
638 if (((ssize_t) count >= (x-3)) || (count >= 127))
642 *packbits=(unsigned char) (count-1);
643 for (j=0; j <= (ssize_t) count; j++)
650 *q++=128; /* EOD marker */
651 return((size_t) (q-compress_pixels));
654 static MagickBooleanType WritePCLImage(const ImageInfo *image_info,Image *image,
655 ExceptionInfo *exception)
658 buffer[MagickPathExtent];
672 register const Quantum *p;
674 register ssize_t i, x;
676 register unsigned char *q;
694 Open output image file.
696 assert(image_info != (const ImageInfo *) NULL);
697 assert(image_info->signature == MagickCoreSignature);
698 assert(image != (Image *) NULL);
699 assert(image->signature == MagickCoreSignature);
700 if (image->debug != MagickFalse)
701 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
702 assert(exception != (ExceptionInfo *) NULL);
703 assert(exception->signature == MagickCoreSignature);
704 status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
705 if (status == MagickFalse)
708 if (image_info->density != (char *) NULL)
713 (void) ParseGeometry(image_info->density,&geometry);
714 density=(size_t) geometry.rho;
721 Initialize the printer.
723 (void) TransformImageColorspace(image,sRGBColorspace,exception);
724 (void) WriteBlobString(image,"\033E"); /* printer reset */
725 (void) WriteBlobString(image,"\033*r3F"); /* set presentation mode */
726 (void) FormatLocaleString(buffer,MagickPathExtent,"\033*r%.20gs%.20gT",
727 (double) image->columns,(double) image->rows);
728 (void) WriteBlobString(image,buffer);
729 (void) FormatLocaleString(buffer,MagickPathExtent,"\033*t%.20gR",(double)
731 (void) WriteBlobString(image,buffer);
732 (void) WriteBlobString(image,"\033&l0E"); /* top margin 0 */
733 if (SetImageMonochrome(image,exception) != MagickFalse)
736 Monochrome image: use default printer monochrome setup.
741 if (image->storage_class == DirectClass)
747 (void) WriteBlobString(image,"\033*v6W"); /* set color mode */
748 (void) WriteBlobByte(image,0); /* RGB */
749 (void) WriteBlobByte(image,3); /* direct by pixel */
750 (void) WriteBlobByte(image,0); /* bits per index (ignored) */
751 (void) WriteBlobByte(image,8); /* bits per red component */
752 (void) WriteBlobByte(image,8); /* bits per green component */
753 (void) WriteBlobByte(image,8); /* bits per blue component */
761 (void) WriteBlobString(image,"\033*v6W"); /* set color mode... */
762 (void) WriteBlobByte(image,0); /* RGB */
763 (void) WriteBlobByte(image,1); /* indexed by pixel */
764 (void) WriteBlobByte(image,bits_per_pixel); /* bits per index */
765 (void) WriteBlobByte(image,8); /* bits per red component */
766 (void) WriteBlobByte(image,8); /* bits per green component */
767 (void) WriteBlobByte(image,8); /* bits per blue component */
768 for (i=0; i < (ssize_t) image->colors; i++)
770 (void) FormatLocaleString(buffer,MagickPathExtent,
771 "\033*v%da%db%dc%.20gI",
772 ScaleQuantumToChar(image->colormap[i].red),
773 ScaleQuantumToChar(image->colormap[i].green),
774 ScaleQuantumToChar(image->colormap[i].blue),(double) i);
775 (void) WriteBlobString(image,buffer);
777 for (one=1; i < (ssize_t) (one << bits_per_pixel); i++)
779 (void) FormatLocaleString(buffer,MagickPathExtent,"\033*v%.20gI",
781 (void) WriteBlobString(image,buffer);
784 option=GetImageOption(image_info,"pcl:fit-to-page");
785 if (IsStringTrue(option) != MagickFalse)
786 (void) WriteBlobString(image,"\033*r3A");
788 (void) WriteBlobString(image,"\033*r1A"); /* start raster graphics */
789 (void) WriteBlobString(image,"\033*b0Y"); /* set y offset */
790 length=(image->columns*bits_per_pixel+7)/8;
791 pixels=(unsigned char *) AcquireQuantumMemory(length+1,sizeof(*pixels));
792 if (pixels == (unsigned char *) NULL)
793 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
794 (void) ResetMagickMemory(pixels,0,(length+1)*sizeof(*pixels));
795 compress_pixels=(unsigned char *) NULL;
796 previous_pixels=(unsigned char *) NULL;
798 compression=UndefinedCompression;
799 if (image_info->compression != UndefinedCompression)
800 compression=image_info->compression;
805 (void) FormatLocaleString(buffer,MagickPathExtent,"\033*b0M");
806 (void) WriteBlobString(image,buffer);
811 compress_pixels=(unsigned char *) AcquireQuantumMemory(length+256,
812 sizeof(*compress_pixels));
813 if (compress_pixels == (unsigned char *) NULL)
815 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
816 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
818 (void) ResetMagickMemory(compress_pixels,0,(length+256)*
819 sizeof(*compress_pixels));
820 (void) FormatLocaleString(buffer,MagickPathExtent,"\033*b2M");
821 (void) WriteBlobString(image,buffer);
826 compress_pixels=(unsigned char *) AcquireQuantumMemory(3*length+256,
827 sizeof(*compress_pixels));
828 if (compress_pixels == (unsigned char *) NULL)
830 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
831 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
833 (void) ResetMagickMemory(compress_pixels,0,(3*length+256)*
834 sizeof(*compress_pixels));
835 previous_pixels=(unsigned char *) AcquireQuantumMemory(length+1,
836 sizeof(*previous_pixels));
837 if (previous_pixels == (unsigned char *) NULL)
839 compress_pixels=(unsigned char *) RelinquishMagickMemory(
841 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
842 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
844 (void) ResetMagickMemory(previous_pixels,0,(length+1)*
845 sizeof(*previous_pixels));
846 (void) FormatLocaleString(buffer,MagickPathExtent,"\033*b3M");
847 (void) WriteBlobString(image,buffer);
851 for (y=0; y < (ssize_t) image->rows; y++)
853 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
854 if (p == (const Quantum *) NULL)
857 switch (bits_per_pixel)
861 register unsigned char
870 for (x=0; x < (ssize_t) image->columns; x++)
873 if (GetPixelLuma(image,p) < (QuantumRange/2.0))
882 p+=GetPixelChannels(image);
885 *q++=byte << (8-bit);
893 for (x=0; x < (ssize_t) image->columns; x++)
895 *q++=(unsigned char) GetPixelIndex(image,p);
896 p+=GetPixelChannels(image);
906 for (x=0; x < (ssize_t) image->columns; x++)
908 *q++=ScaleQuantumToChar(GetPixelRed(image,p));
909 *q++=ScaleQuantumToChar(GetPixelGreen(image,p));
910 *q++=ScaleQuantumToChar(GetPixelBlue(image,p));
911 p+=GetPixelChannels(image);
920 (void) FormatLocaleString(buffer,MagickPathExtent,"\033*b%.20gW",
922 (void) WriteBlobString(image,buffer);
923 (void) WriteBlob(image,length,pixels);
928 packets=PCLPackbitsCompressImage(length,pixels,compress_pixels);
929 (void) FormatLocaleString(buffer,MagickPathExtent,"\033*b%.20gW",
931 (void) WriteBlobString(image,buffer);
932 (void) WriteBlob(image,packets,compress_pixels);
938 for (i=0; i < (ssize_t) length; i++)
939 previous_pixels[i]=(~pixels[i]);
940 packets=PCLDeltaCompressImage(length,previous_pixels,pixels,
942 (void) FormatLocaleString(buffer,MagickPathExtent,"\033*b%.20gW",
944 (void) WriteBlobString(image,buffer);
945 (void) WriteBlob(image,packets,compress_pixels);
946 (void) CopyMagickMemory(previous_pixels,pixels,length*
952 (void) WriteBlobString(image,"\033*rB"); /* end graphics */
959 compress_pixels=(unsigned char *) RelinquishMagickMemory(
965 previous_pixels=(unsigned char *) RelinquishMagickMemory(
967 compress_pixels=(unsigned char *) RelinquishMagickMemory(
972 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
973 if (GetNextImageInList(image) == (Image *) NULL)
975 image=SyncNextImageInList(image);
976 status=SetImageProgress(image,SaveImagesTag,scene++,
977 GetImageListLength(image));
978 if (status == MagickFalse)
980 } while (image_info->adjoin != MagickFalse);
981 (void) WriteBlobString(image,"\033E");
982 (void) CloseBlob(image);